Lost, Python Programming

Import the sample code below into the Python IDLE and enhance it, run it and debug it. Add features to make this a more realistic database tool by providing for easy data entry and retrieval. Export your successful program to a Python file for later upload to coursenet.

Here is the sample source code:

#!/usr/bin/python
#
# An example from Sean Reifschneider''s Python Tutorial at Linux Expo 98.
#
# Copyright (c) 1998 Sean Reifschneider, tummy.com, ltd.
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# You can contact Sean Reifschneider at
# P.O. Box 270624,
# Fort Collins, CO USA 80527-0624,
# or at jafo-gpl@tummy.com
#
# Simple phone-number database module

import shelve
import string

UNKNOWN = 0
HOME = 1
WORK = 2
FAX = 3
CELL = 4

class phoneentry:
def __init__(self, name = ''Unknown'', number = ''Unknown'',
type = UNKNOWN):
self.name = name
self.number = number
self.type = type

# create string representation
def __repr__(self):
return(''%s:%d'' % ( self.name, self.type ))

# fuzzy compare or two items
def __cmp__(self, that):
this = string.lower(str(self))
that = string.lower(that)

if string.find(this, that) >= 0:
return(0)
return(cmp(this, that))

def showtype(self):
if self.type == UNKNOWN: return(''Unknown'')
if self.type == HOME: return(''Home'')
if self.type == WORK: return(''Work'')
if self.type == FAX: return(''Fax'')
if self.type == CELL: return(''Cellular'')

class phonedb:
def __init__(self, dbname = ''phonedata''):
self.dbname = dbname;
self.shelve = shelve.open(self.dbname);

def __del__(self):
self.shelve.close()
self.shelve = None

def add(self, name, number, type = HOME):
e = phoneentry(name, number, type)
self.shelve[str(e)] = e

def lookup(self, string):
list = []
for key in self.shelve.keys():
e = self.shelve[key]
if cmp(e, string) == 0:
list.append(e)

return(list)

# if not being loaded as a module, run a small test
if __name__ == ''__main__'':
foo = phonedb()
foo.add(''Sean Reifschneider'', ''970-555-1111'', HOME)
foo.add(''Sean Reifschneider'', ''970-555-2222'', CELL)
foo.add(''Evelyn Mitchell'', ''970-555-1111'', HOME)

print ''First lookup:''
for entry in foo.lookup(''reifsch''):
print ''%-40s %s (%s)'' % ( entry.name, entry.number, entry.showtype() )
print

print ''Second lookup:''
for entry in foo.lookup(''e''):
print ''%-40s %s (%s)'' % ( entry.name, entry.number, entry.showtype() )

Posted Date: 1/11/2013 9:45:01 AM | Location : Afghanistan







Related Discussions:- Lost, Assignment Help, Ask Question on Lost, Get Answer, Expert's Help, Lost Discussions

Write discussion on Lost
Your posts are moderated
Related Questions
When investing money, an important concept to know is compound interest. The equation FV = PV (1+rate)periods . This relates the following four quantities. The present value (

Depending on your  previous programming background, we use different sides  through the available readings:   If you have never programmed before: you should start with a

1 Low Level Exploits 1.1 Savegames Jimmy is becoming increasingly frustrated at the computer game hes playing. He has a save right before the levels boss but he needs either more

Synthetic models One  goal  of various  people in a variety of sub-disciplines of  electrical  engineering and  computer science is automatic synthesis of machine from  formal

Print vs Return Here are two different method declarations: def f1(x): print x + 1 def f2(x): return x + 1 What happens when  we call them? >>> f1(3) 4 >>

Use the function to compute and print the sum of first n prime numbers.

how to calculate angle between 2 moving line in 2d space

Write a program that will take price data for stocks and print it graphically to the screen. Your program should begin by asking the user for the file name. It should then create a

Normalize a vector Let's imagine we want  to normalize a vector  of three  variables;  that  is to compute a new  vector  of three values,  such that its size  is 1. Here is o

how to use re.sub to seperate distint words and phrases when translating text from English to Spanish or vis versa in python programming